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Move TTY unrelated bits out of <sys/tty.h>.

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For some reason, the <sys/tty.h> header file also contains routines of the
clists and console that are used inside the TTY layer. Because the clists
are not only used by the TTY layer (example: various input drivers), we'd
better move the entire clist programming interface into <sys/clist.h>. Also
remove a declaration of nonexistent variable.

The <sys/tty.h> header also contains various definitions for the console
code (tty_cons.c). Also move these to <sys/cons.h>, because they are
not implemented inside the TTY layer.

While there, create separate malloc pools for the clist and console code.

Approved by:	philip (mentor)
This commit is contained in:
Ed Schouten 2008-05-23 16:06:35 +00:00
parent 81590c5b37
commit 8837b0dd09
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179246
7 changed files with 47 additions and 36 deletions
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8
sys/kern/subr_clist.c
View File

@ -42,6 +42,8 @@ __FBSDID("$FreeBSD$");
static void clist_init(void *);
SYSINIT(clist, SI_SUB_CLIST, SI_ORDER_FIRST, clist_init, NULL);
static MALLOC_DEFINE(M_CLIST, "clist", "clist queue blocks");
static struct cblock *cfreelist = 0;
int cfreecount = 0;
static int cslushcount;
@ -133,11 +135,11 @@ cblock_alloc_cblocks(number)
struct cblock *cbp;
for (i = 0; i < number; ++i) {
cbp = malloc(sizeof *cbp, M_TTYS, M_NOWAIT);
cbp = malloc(sizeof *cbp, M_CLIST, M_NOWAIT);
if (cbp == NULL) {
printf(
"cblock_alloc_cblocks: M_NOWAIT malloc failed, trying M_WAITOK\n");
cbp = malloc(sizeof *cbp, M_TTYS, M_WAITOK);
cbp = malloc(sizeof *cbp, M_CLIST, M_WAITOK);
}
/*
* Freed cblocks have zero quotes and garbage elsewhere.
@ -192,7 +194,7 @@ cblock_free_cblocks(number)
int i;
for (i = 0; i < number; ++i)
free(cblock_alloc(), M_TTYS);
free(cblock_alloc(), M_CLIST);
ctotcount -= number;
}

1
sys/kern/tty.c
View File

@ -78,6 +78,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/cons.h>
#include <sys/filio.h>
#include <sys/lock.h>
#include <sys/mutex.h>

6
sys/kern/tty_cons.c
View File

@ -66,6 +66,8 @@ __FBSDID("$FreeBSD$");
#include <machine/cpu.h>
#include <machine/clock.h>
static MALLOC_DEFINE(M_TTYCONS, "tty console", "tty console handling");
static d_open_t cnopen;
static d_close_t cnclose;
static d_read_t cnread;
@ -673,7 +675,7 @@ constty_set(struct tty *tp)
KASSERT(tp != NULL, ("constty_set: NULL tp"));
if (consbuf == NULL) {
size = consmsgbuf_size;
consbuf = malloc(size, M_TTYS, M_WAITOK);
consbuf = malloc(size, M_TTYCONS, M_WAITOK);
msgbuf_init(&consmsgbuf, consbuf, size);
callout_init(&conscallout, 0);
}
@ -695,7 +697,7 @@ constty_clear(void)
callout_stop(&conscallout);
while ((c = msgbuf_getchar(&consmsgbuf)) != -1)
cnputc(c);
free(consbuf, M_TTYS);
free(consbuf, M_TTYCONS);
consbuf = NULL;
}

8
sys/kern/tty_subr.c
View File

@ -42,6 +42,8 @@ __FBSDID("$FreeBSD$");
static void clist_init(void *);
SYSINIT(clist, SI_SUB_CLIST, SI_ORDER_FIRST, clist_init, NULL);
static MALLOC_DEFINE(M_CLIST, "clist", "clist queue blocks");
static struct cblock *cfreelist = 0;
int cfreecount = 0;
static int cslushcount;
@ -133,11 +135,11 @@ cblock_alloc_cblocks(number)
struct cblock *cbp;
for (i = 0; i < number; ++i) {
cbp = malloc(sizeof *cbp, M_TTYS, M_NOWAIT);
cbp = malloc(sizeof *cbp, M_CLIST, M_NOWAIT);
if (cbp == NULL) {
printf(
"cblock_alloc_cblocks: M_NOWAIT malloc failed, trying M_WAITOK\n");
cbp = malloc(sizeof *cbp, M_TTYS, M_WAITOK);
cbp = malloc(sizeof *cbp, M_CLIST, M_WAITOK);
}
/*
* Freed cblocks have zero quotes and garbage elsewhere.
@ -192,7 +194,7 @@ cblock_free_cblocks(number)
int i;
for (i = 0; i < number; ++i)
free(cblock_alloc(), M_TTYS);
free(cblock_alloc(), M_CLIST);
ctotcount -= number;
}

25
sys/sys/clist.h
View File

@ -33,6 +33,19 @@
#ifndef _SYS_CLIST_H_
#define _SYS_CLIST_H_
/*
* Clists are character lists, which is a variable length linked list
* of cblocks, with a count of the number of characters in the list.
*/
struct clist {
int c_cc; /* Number of characters in the clist. */
int c_cbcount; /* Number of cblocks. */
int c_cbmax; /* Max # cblocks allowed for this clist. */
int c_cbreserved; /* # cblocks reserved for this clist. */
char *c_cf; /* Pointer to the first cblock. */
char *c_cl; /* Pointer to the last cblock. */
};
struct cblock {
struct cblock *c_next; /* next cblock in queue */
unsigned char c_quote[CBQSIZE]; /* quoted characters */
@ -40,8 +53,18 @@ struct cblock {
};
#ifdef _KERNEL
extern struct cblock *cfree;
extern int cfreecount;
int b_to_q(char *cp, int cc, struct clist *q);
void catq(struct clist *from, struct clist *to);
void clist_alloc_cblocks(struct clist *q, int ccmax, int ccres);
void clist_free_cblocks(struct clist *q);
int getc(struct clist *q);
void ndflush(struct clist *q, int cc);
char *nextc(struct clist *q, char *cp, int *c);
int putc(int c, struct clist *q);
int q_to_b(struct clist *q, char *cp, int cc);
int unputc(struct clist *q);
#endif
#endif

7
sys/sys/cons.h
View File

@ -39,6 +39,8 @@
#define _MACHINE_CONS_H_
struct consdev;
struct tty;
typedef void cn_probe_t(struct consdev *);
typedef void cn_init_t(struct consdev *);
typedef void cn_term_t(struct consdev *);
@ -80,6 +82,9 @@ struct consdev {
#ifdef _KERNEL
extern struct msgbuf consmsgbuf; /* Message buffer for constty. */
extern struct tty *constty; /* Temporary virtual console. */
#define CONS_DRIVER(name, probe, init, term, getc, checkc, putc, dbctl) \
static struct consdev name##_consdev = { \
probe, init, term, getc, checkc, putc \
@ -108,6 +113,8 @@ int cngetc(void);
void cnputc(int);
void cnputs(char *);
int cnunavailable(void);
void constty_set(struct tty *tp);
void constty_clear(void);
#endif /* _KERNEL */

28
sys/sys/tty.h
View File

@ -46,25 +46,13 @@
#ifndef _SYS_TTY_H_
#define _SYS_TTY_H_
#include <sys/clist.h>
#include <sys/termios.h>
#include <sys/queue.h>
#include <sys/selinfo.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
/*
* Clists are character lists, which is a variable length linked list
* of cblocks, with a count of the number of characters in the list.
*/
struct clist {
int c_cc; /* Number of characters in the clist. */
int c_cbcount; /* Number of cblocks. */
int c_cbmax; /* Max # cblocks allowed for this clist. */
int c_cbreserved; /* # cblocks reserved for this clist. */
char *c_cf; /* Pointer to the first cblock. */
char *c_cl; /* Pointer to the last cblock. */
};
struct tty;
struct pps_state;
struct cdev;
@ -313,25 +301,12 @@ MALLOC_DECLARE(M_TTYS);
#define ISINIT(dev) (minor(dev) & MINOR_INIT)
#define ISLOCK(dev) (minor(dev) & MINOR_LOCK)
extern struct msgbuf consmsgbuf; /* Message buffer for constty. */
extern struct tty *constty; /* Temporary virtual console. */
extern long tk_cancc;
extern long tk_nin;
extern long tk_nout;
extern long tk_rawcc;
int b_to_q(char *cp, int cc, struct clist *q);
void catq(struct clist *from, struct clist *to);
void clist_alloc_cblocks(struct clist *q, int ccmax, int ccres);
void clist_free_cblocks(struct clist *q);
void constty_set(struct tty *tp);
void constty_clear(void);
int getc(struct clist *q);
void ndflush(struct clist *q, int cc);
char *nextc(struct clist *q, char *cp, int *c);
void nottystop(struct tty *tp, int rw);
int putc(int c, struct clist *q);
int q_to_b(struct clist *q, char *cp, int cc);
void termioschars(struct termios *t);
int tputchar(int c, struct tty *tp);
int ttcompat(struct tty *tp, u_long com, caddr_t data, int flag);
@ -367,7 +342,6 @@ int ttyref(struct tty *tp);
int ttyrel(struct tty *tp);
int ttysleep(struct tty *tp, void *chan, int pri, char *wmesg, int timo);
int ttywait(struct tty *tp);
int unputc(struct clist *q);
static __inline int
tt_open(struct tty *t, struct cdev *c)